Converts an HDR input file, in EXR format, into any image format supported by
ImageMagick, and performs gamma-correction. The brightest possible value in the
input image is taken to be 1.0 by default (files generated by hdr_create and
hdr_squish will observe this convention), but this may be adjusted by changing
the stops parameter, which is the number of stops by which the output image
should be over-exposed (or under-exposed, if negative).

Usage: hdr_convert.exe [OPTION...]
  -h, --help                show help
  -i, --input=INPUT         input file (EXR)
  -o, --output=OUTPUT       output file
  -s, --stops=FLOAT(=0)     stops by which to over-expose